Cu/LaCrO 3 joining by local melt infiltration through laser cladding

Direct bonding of copper and porous LaCrO 3 without an extra filler interlayer was successfully completed using local and fast Cu‐infiltration through laser cladding. This significantly reduced the susceptibility of the ceramic to cracking. A high‐speed camera investigation into the wetting and infi...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 2018-10, Vol.101 (10), p.4472-4479
Main Authors: Wasilewski, Eric, Wolf, Matthias, Zhang, Wei, Ossenbrink, Ralf, Michailov, Vesselin
Format: Article
Language:English
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Summary:Direct bonding of copper and porous LaCrO 3 without an extra filler interlayer was successfully completed using local and fast Cu‐infiltration through laser cladding. This significantly reduced the susceptibility of the ceramic to cracking. A high‐speed camera investigation into the wetting and infiltration behavior of a Cu‐melt into LaCrO 3 with a porosity of ~63 vol% was performed. By adjusting the focal distance with a constant laser power of 300 W, the Cu‐melt was rapidly infiltrated into the ceramic preform in 10 seconds. This was completed under atmospheric air conditions, without added inert gas. The joining process developed can be used to fabricate ceramic/metal joints with targeted (micro‐) structure properties by adjusting the infiltrated melt and the infiltration depth, which would be suitable for many applications, such as multifunctional devices, solid oxide fuel cells or heating elements.
ISSN:0002-7820
1551-2916
DOI:10.1111/jace.15767